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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-86776",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-10T13:48:59.785045Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
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        "providerMetadata": {
          "dateUpdated": "2026-09-10T14:58:52.747Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://keepass.info/",
          "defaultStatus": "unaffected",
          "product": "KeePass",
          "vendor": "KeePass",
          "versions": [
            {
              "lessThanOrEqual": "2.61.1",
              "status": "affected",
              "version": "2.35",
              "versionType": "custom"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:keepass:keepass:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "KSecur1ty"
        }
      ],
      "datePublic": "2026-08-13T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "KeePass versions 2.35 through 2.61.1 fail to validate KDBX header field sizes before memory allocation in the ReadHeaderField function. Attackers can craft a malicious KDBX file declaring excessive header field lengths to trigger allocation of gigabytes of memory, causing the application to consume resources and terminate."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 3.3,
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
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            "userInteraction": "ACTIVE",
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            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-789",
              "description": "Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-09T10:07:26.502Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Reporter write-up and proof of concept",
          "tags": [
            "exploit",
            "technical-description"
          ],
          "url": "https://github.com/KSecur1ty/KDBX-Header-Size-Mirage-POC"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://keepass.info/"
        },
        {
          "name": "KeePass 2.61.1 downloads (including source)",
          "tags": [
            "product"
          ],
          "url": "https://keepass.info/download.html"
        },
        {
          "name": "VulnCheck Advisory: KeePass 2.35 through 2.61.1 Memory Exhaustion via KDBX Header Field Size",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/keepass-2.35-through-2.61.1-memory-exhaustion-via-kdbx-header-field-size"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "KeePass 2.35 through 2.61.1 Memory Exhaustion via KDBX Header Field Size",
      "x_generator": {
        "engine": "vulncheck-endgame"
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    }
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    "cveId": "CVE-2026-86776",
    "datePublished": "2026-09-09T10:07:26.502Z",
    "dateReserved": "2026-09-08T11:35:02.617Z",
    "dateUpdated": "2026-09-10T14:58:52.747Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}